1 /* |
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2 * ============================================================================ |
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3 * Name : ./accesssec/eapol/eapol_framework/wapi_common/src/wapi_am_crypto_sms4.cpp |
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4 * Part of : WAPI / WAPI *** Info from the SWAD |
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5 * Description : WAPI authentication |
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6 * Version : %version: 4 % << Don't touch! Updated by Synergy at check-out. |
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7 * |
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8 * Copyright © 2001-2009 Nokia. All rights reserved. |
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9 * This material, including documentation and any related computer |
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10 * programs, is protected by copyright controlled by Nokia. All |
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11 * rights are reserved. Copying, including reproducing, storing, |
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12 * adapting or translating, any or all of this material requires the |
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13 * prior written consent of Nokia. This material also contains |
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14 * confidential information which may not be disclosed to others |
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15 * without the prior written consent of Nokia. |
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16 * ============================================================================ |
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17 * Template version: 4.1.1 |
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18 */ |
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19 |
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20 // This is enumeration of WAPI source code. |
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21 #if defined(USE_EAP_MINIMUM_RELEASE_TRACES) |
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22 #undef EAP_FILE_NUMBER_ENUM |
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23 #define EAP_FILE_NUMBER_ENUM 20010 |
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24 #undef EAP_FILE_NUMBER_DATE |
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25 #define EAP_FILE_NUMBER_DATE 1127594498 |
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26 #endif //#if defined(USE_EAP_MINIMUM_RELEASE_TRACES) |
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27 |
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28 |
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29 #include "eap_am_memory.h" |
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30 #include "wapi_am_crypto_sms4.h" |
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31 |
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32 |
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33 //------------------------------------------------------------ |
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34 // SMS4 constants |
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35 |
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36 // CK |
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37 const u32_t wapi_am_crypto_sms4_c::m_CK[wapi_am_crypto_sms4_c::WAPI_AM_CRYPTO_SMS4_CK_u32_COUNT] = |
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38 { |
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39 0x00070e15, 0x1c232a31, 0x383f464d, 0x545b6269, |
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40 0x70777e85, 0x8c939aa1, 0xa8afb6bd, 0xc4cbd2d9, |
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41 0xe0e7eef5, 0xfc030a11, 0x181f262d, 0x343b4249, |
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42 0x50575e65, 0x6c737a81, 0x888f969d, 0xa4abb2b9, |
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43 0xc0c7ced5, 0xdce3eaf1, 0xf8ff060d, 0x141b2229, |
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44 0x30373e45, 0x4c535a61, 0x686f767d, 0x848b9299, |
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45 0xa0a7aeb5, 0xbcc3cad1, 0xd8dfe6ed, 0xf4fb0209, |
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46 0x10171e25, 0x2c333a41, 0x484f565d, 0x646b7279 |
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47 }; |
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48 |
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49 // FK |
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50 const u32_t wapi_am_crypto_sms4_c::m_FK[wapi_am_crypto_sms4_c::WAPI_AM_CRYPTO_SMS4_FK_u32_COUNT] = |
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51 { |
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52 0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc |
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53 }; |
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54 |
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55 |
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56 // S-box |
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57 const u8_t wapi_am_crypto_sms4_c::m_SBOX[wapi_am_crypto_sms4_c::WAPI_AM_CRYPTO_SMS4_SBOX_u8_SIZE] = |
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58 { |
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59 0xd6, 0x90, 0xe9, 0xfe, 0xcc, 0xe1, 0x3d, 0xb7, 0x16, 0xb6, 0x14, 0xc2, 0x28, 0xfb, 0x2c, 0x05, |
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60 0x2b, 0x67, 0x9a, 0x76, 0x2a, 0xbe, 0x04, 0xc3, 0xaa, 0x44, 0x13, 0x26, 0x49, 0x86, 0x06, 0x99, |
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61 0x9c, 0x42, 0x50, 0xf4, 0x91, 0xef, 0x98, 0x7a, 0x33, 0x54, 0x0b, 0x43, 0xed, 0xcf, 0xac, 0x62, |
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62 0xe4, 0xb3, 0x1c, 0xa9, 0xc9, 0x08, 0xe8, 0x95, 0x80, 0xdf, 0x94, 0xfa, 0x75, 0x8f, 0x3f, 0xa6, |
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63 0x47, 0x07, 0xa7, 0xfc, 0xf3, 0x73, 0x17, 0xba, 0x83, 0x59, 0x3c, 0x19, 0xe6, 0x85, 0x4f, 0xa8, |
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64 0x68, 0x6b, 0x81, 0xb2, 0x71, 0x64, 0xda, 0x8b, 0xf8, 0xeb, 0x0f, 0x4b, 0x70, 0x56, 0x9d, 0x35, |
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65 0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, 0xd1, 0xa2, 0x25, 0x22, 0x7c, 0x3b, 0x01, 0x21, 0x78, 0x87, |
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66 0xd4, 0x00, 0x46, 0x57, 0x9f, 0xd3, 0x27, 0x52, 0x4c, 0x36, 0x02, 0xe7, 0xa0, 0xc4, 0xc8, 0x9e, |
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67 0xea, 0xbf, 0x8a, 0xd2, 0x40, 0xc7, 0x38, 0xb5, 0xa3, 0xf7, 0xf2, 0xce, 0xf9, 0x61, 0x15, 0xa1, |
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68 0xe0, 0xae, 0x5d, 0xa4, 0x9b, 0x34, 0x1a, 0x55, 0xad, 0x93, 0x32, 0x30, 0xf5, 0x8c, 0xb1, 0xe3, |
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69 0x1d, 0xf6, 0xe2, 0x2e, 0x82, 0x66, 0xca, 0x60, 0xc0, 0x29, 0x23, 0xab, 0x0d, 0x53, 0x4e, 0x6f, |
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70 0xd5, 0xdb, 0x37, 0x45, 0xde, 0xfd, 0x8e, 0x2f, 0x03, 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b, 0x51, |
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71 0x8d, 0x1b, 0xaf, 0x92, 0xbb, 0xdd, 0xbc, 0x7f, 0x11, 0xd9, 0x5c, 0x41, 0x1f, 0x10, 0x5a, 0xd8, |
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72 0x0a, 0xc1, 0x31, 0x88, 0xa5, 0xcd, 0x7b, 0xbd, 0x2d, 0x74, 0xd0, 0x12, 0xb8, 0xe5, 0xb4, 0xb0, |
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73 0x89, 0x69, 0x97, 0x4a, 0x0c, 0x96, 0x77, 0x7e, 0x65, 0xb9, 0xf1, 0x09, 0xc5, 0x6e, 0xc6, 0x84, |
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74 0x18, 0xf0, 0x7d, 0xec, 0x3a, 0xdc, 0x4d, 0x20, 0x79, 0xee, 0x5f, 0x3e, 0xd7, 0xcb, 0x39, 0x48 |
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75 }; |
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76 |
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77 //------------------------------------------------------------ |
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78 |
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79 |
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80 |
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81 EAP_FUNC_EXPORT wapi_am_crypto_sms4_c::~wapi_am_crypto_sms4_c() |
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82 { |
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83 m_is_valid = false; |
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84 } |
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85 |
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86 //------------------------------------------------------------ |
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87 |
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88 EAP_FUNC_EXPORT wapi_am_crypto_sms4_c::wapi_am_crypto_sms4_c( |
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89 abs_eap_am_tools_c * const tools) |
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90 : m_am_tools(tools) |
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91 , m_is_valid(false) |
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92 { |
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93 set_is_valid(); |
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94 } |
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95 |
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96 //------------------------------------------------------------ |
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97 |
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98 EAP_FUNC_EXPORT void wapi_am_crypto_sms4_c::set_is_invalid() |
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99 { |
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100 m_is_valid = false; |
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101 } |
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102 |
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103 //------------------------------------------------------------ |
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104 |
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105 EAP_FUNC_EXPORT void wapi_am_crypto_sms4_c::set_is_valid() |
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106 { |
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107 m_is_valid = true; |
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108 } |
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109 |
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110 //------------------------------------------------------------ |
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111 |
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112 EAP_FUNC_EXPORT bool wapi_am_crypto_sms4_c::get_is_valid() |
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113 { |
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114 return m_is_valid; |
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115 } |
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116 |
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117 //------------------------------------------------------------ |
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118 |
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119 EAP_FUNC_EXPORT u32_t wapi_am_crypto_sms4_c::get_key_size() |
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120 { |
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121 return WAPI_AM_CRYPTO_SMS4_KEY_u8_SIZE; |
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122 } |
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123 |
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124 //------------------------------------------------------------ |
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125 |
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126 EAP_FUNC_EXPORT u32_t wapi_am_crypto_sms4_c::get_block_size() |
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127 { |
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128 return WAPI_AM_CRYPTO_SMS4_BLOCK_u8_SIZE; |
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129 } |
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130 |
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131 //------------------------------------------------------------ |
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132 |
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133 EAP_FUNC_EXPORT eap_status_e wapi_am_crypto_sms4_c::set_key( |
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134 const eap_variable_data_c * const p_key) |
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135 { |
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136 |
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137 // key in network order |
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138 |
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139 // check if key is ok |
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140 if( p_key == 0 || |
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141 p_key->get_is_valid() == false || |
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142 p_key->get_data_length() != WAPI_AM_CRYPTO_SMS4_KEY_u8_SIZE ) |
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143 { |
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144 return EAP_STATUS_RETURN(m_am_tools, eap_status_illegal_encryption_parameter_size); |
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145 } |
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146 |
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147 // temporary table to hold the currently |
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148 // needed key data words |
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149 u32_t key_table[WAPI_AM_CRYPTO_SMS4_KEY_u8_SIZE/4]; |
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150 u32_t ind = 0; |
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151 |
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152 for( ind = 0; ind < WAPI_AM_CRYPTO_SMS4_KEY_u8_SIZE/4; ++ind ) |
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153 { |
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154 // read key from variable data to a u32_t table for faster processing |
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155 // TODO: Is this ok for endianness on other platforms? |
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156 key_table[ind] = eap_read_u32_t_network_order(p_key->get_data() + ind*4, 4); |
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157 } |
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158 |
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159 // temporary variable to hold the current |
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160 // expansion result (one word) |
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161 u32_t tmp_K; |
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162 |
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163 // XOR key words with FKs |
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164 for( ind = 0; ind < WAPI_AM_CRYPTO_SMS4_KEY_u8_SIZE/4; ++ind ) |
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165 { |
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166 key_table[ind] = key_table[ind] ^ m_FK[ind]; |
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167 } |
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168 |
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169 // compute the key expansion |
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170 for( ind = 0; ind < WAPI_AM_CRYPTO_SMS4_KEY_SCHEDULE_u32_SIZE; ++ind ) |
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171 { |
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172 |
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173 // See SMS4 spec for these |
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174 tmp_K = key_table[1] ^ key_table[2] ^ key_table[3] ^ m_CK[ind]; |
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175 sms4_substitute( &tmp_K ); |
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176 L_key( &tmp_K ); |
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177 tmp_K ^= key_table[0]; |
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178 |
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179 // store the result for the next round |
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180 key_table[0] = key_table[1]; |
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181 key_table[1] = key_table[2]; |
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182 key_table[2] = key_table[3]; |
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183 key_table[3] = tmp_K; |
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184 |
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185 // store the expansion result |
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186 m_key_schedule[ind] = tmp_K; |
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187 |
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188 } // for() |
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189 |
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190 |
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191 return EAP_STATUS_RETURN(m_am_tools, eap_status_ok); |
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192 } |
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193 |
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194 //------------------------------------------------------------ |
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195 |
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196 /* |
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197 * Performs L' function for a key word. |
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198 */ |
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199 |
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200 EAP_FUNC_EXPORT void wapi_am_crypto_sms4_c::L_key( u32_t* data ) |
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201 { |
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202 *data ^= sms4_rotate_left(*data, 13) ^ sms4_rotate_left(*data, 23); |
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203 return; |
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204 } |
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205 |
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206 //------------------------------------------------------------ |
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207 |
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208 /* |
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209 * Performs S-box substitution for a data word, |
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210 * i.e. four S-box substitutions. |
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211 */ |
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212 |
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213 EAP_FUNC_EXPORT void wapi_am_crypto_sms4_c::sms4_substitute( u32_t* data ) |
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214 { |
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215 u8_t* tmp = reinterpret_cast<u8_t*>(data); |
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216 |
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217 // S-box substitution to the bytes of the word |
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218 *tmp = m_SBOX[*tmp]; |
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219 *(tmp+1) = m_SBOX[*(tmp+1)]; |
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220 *(tmp+2) = m_SBOX[*(tmp+2)]; |
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221 *(tmp+3) = m_SBOX[*(tmp+3)]; |
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222 |
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223 return; |
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224 } |
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225 |
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226 //------------------------------------------------------------ |
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227 |
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228 /* |
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229 * Performs L function for a data word. |
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230 */ |
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231 |
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232 EAP_FUNC_EXPORT void wapi_am_crypto_sms4_c::L_data( u32_t* data ) |
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233 { |
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234 *data ^= |
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235 sms4_rotate_left(*data, 2) ^ |
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236 sms4_rotate_left(*data, 10) ^ |
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237 sms4_rotate_left(*data, 18) ^ |
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238 sms4_rotate_left(*data, 24); |
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239 return; |
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240 } |
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241 |
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242 //------------------------------------------------------------ |
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243 |
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244 EAP_FUNC_EXPORT eap_status_e wapi_am_crypto_sms4_c::ecb_process_data( |
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245 const void * const data_in, |
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246 void * const data_out, |
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247 const u32_t data_blocks, |
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248 bool encrypt) |
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249 { |
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250 |
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251 // data in network order |
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252 |
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253 // check if data is ok |
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254 if( data_in == 0 || |
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255 data_out == 0 || |
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256 data_blocks <= 0 ) |
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257 { |
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258 return EAP_STATUS_RETURN(m_am_tools, eap_status_illegal_encryption_parameter_size); |
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259 } |
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260 |
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261 // temporary pointers to data_in and data_out |
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262 const u8_t* p_data_in = reinterpret_cast<const u8_t*>(data_in); |
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263 u8_t* p_data_out = reinterpret_cast<u8_t*>(data_out); |
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264 |
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265 // count of the processed blocks |
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266 u32_t blocks_processed = 0; |
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267 |
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268 // temporary table to hold the currently needed data words |
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269 u32_t data_table[WAPI_AM_CRYPTO_SMS4_BLOCK_u8_SIZE/4]; |
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270 u32_t ind = 0; |
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271 eap_status_e status(eap_status_ok); |
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272 |
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273 // temporary variable to hold the current result (one word) |
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274 u32_t tmp_X; |
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275 |
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276 // ecrypt data in ECB mode |
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277 while( blocks_processed < data_blocks ) |
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278 { |
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279 |
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280 for( ind = 0; ind < 4; ++ind ) |
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281 { |
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282 // read network order data to a u32_t table for faster processing |
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283 // TODO: Is this ok for endianness on other platforms? |
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284 data_table[ind] = eap_read_u32_t_network_order(p_data_in + ind*4, 4); |
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285 } |
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286 |
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287 // execute the SMS4 rounds |
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288 for( ind = 0; ind < 32; ++ind ) |
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289 { |
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290 |
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291 // See SMS4 spec for these |
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292 tmp_X = data_table[1] ^ data_table[2] ^ data_table[3]; |
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293 |
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294 if( encrypt == true ) |
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295 { |
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296 tmp_X ^= m_key_schedule[ind]; |
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297 } |
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298 else |
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299 { |
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300 // in decryption the key schedule is reversed |
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301 tmp_X ^= m_key_schedule[WAPI_AM_CRYPTO_SMS4_KEY_SCHEDULE_u32_SIZE-1-ind]; |
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302 } |
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303 |
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304 sms4_substitute( &tmp_X ); |
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305 L_data( &tmp_X ); |
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306 tmp_X ^= data_table[0]; |
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307 |
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308 // store the result for the next round |
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309 data_table[0] = data_table[1]; |
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310 data_table[1] = data_table[2]; |
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311 data_table[2] = data_table[3]; |
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312 data_table[3] = tmp_X; |
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313 |
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314 } // for() |
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315 |
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316 // the result of the final round is the output, |
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317 // except that the order of the words is reversed |
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318 // (R function in the SMS4 spec) |
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319 for( ind = 0; ind < 4; ++ind ) |
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320 { |
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321 status = eap_write_u32_t_network_order( p_data_out+4*ind, 4, data_table[3-ind] ); |
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322 if( status != eap_status_ok ) |
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323 { |
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324 return EAP_STATUS_RETURN(m_am_tools, status); |
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325 } |
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326 } |
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327 |
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328 ++blocks_processed; |
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329 // take the next data block for processing |
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330 p_data_in += 16; |
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331 p_data_out += 16; |
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332 |
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333 } // for() |
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334 |
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335 return EAP_STATUS_RETURN(m_am_tools, eap_status_ok); |
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336 } |
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337 |
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338 //------------------------------------------------------------ |
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339 |
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340 EAP_FUNC_EXPORT eap_status_e wapi_am_crypto_sms4_c::ecb_encrypt( |
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341 const void * const data_in, |
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342 void * const data_out, |
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343 const u32_t data_blocks) |
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344 { |
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345 eap_status_e status = ecb_process_data( data_in, data_out, data_blocks, true ); |
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346 return EAP_STATUS_RETURN(m_am_tools, status); |
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347 } |
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348 |
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349 //------------------------------------------------------------ |
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350 |
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351 EAP_FUNC_EXPORT eap_status_e wapi_am_crypto_sms4_c::ecb_decrypt( |
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352 const void * const data_in, |
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353 void * const data_out, |
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354 const u32_t data_blocks) |
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355 { |
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356 eap_status_e status = ecb_process_data( data_in, data_out, data_blocks, false ); |
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357 return EAP_STATUS_RETURN(m_am_tools, status); |
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358 } |
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359 |
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360 //------------------------------------------------------------ |
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361 |
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362 // End. |
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